ESXi 7.0 requires a minimum of 4 GB of physical RAM. Provide at least 8 GB of RAM to run virtual machines in typical production environments.
4GB only for the HOST
And about AHV?
What is the minimum memory for AHV only?, without CVMs and VMs
Best answer by Neel Kotak
The minimum memory requirement for the AHV host is 2.6 GB and 60 MB per VM.
Please find the following AHV guide for more detail